critical thickness of a film

of a film
https://doi.org/10.1351/goldbook.C01403
A @[email protected] often thins gradually to a thickness at which it either ruptures or converts abruptly to an @[email protected] This thickness is sometimes well enough defined statistically to be considered a critical thickness, \(t_{\text{c}}\) or \(h_{\text{c}}\).
Source:
PAC, 1972, 31, 577. (Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry) on page 614 [Terms] [Paper]